1929
In contrast to the southern areas of China, Korea is to a great extent represented by a territory still barely touched and in need of roads, improvement of forests by removal of worthless trees and shrubs and regulated irrigation. The farther one proceeds into the interior, the more primitive the landscape becomes. Plowed fields stop and forested areas with a multitude of wild fruit trees take over. Here it is still possible to find, in a primitive condition, all transitions from wild to cultivated forms; therefore it is to a great extent possible to understand the origin of many Chinese cultivated plants. In this area it is still possible to find wild soyabeans with small seeds and dehiscing pods. This is a relative of the cultivated form which was introduced at a very early stage to the Soviet Far East.
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